When you're using old-fashioned cash, you stop spending money when you're wallet is empty. But with a debit card, it's easier than ever to let an account get too low -- leaving you slapped with overdraft fees. Without needing to keep a constant eye on your account, you could prevent these kinds of fees by asking your bank to send you a mobile alert when your account gets too low.
Most banks allow you to customize the alert as well. For instance, you could specify that the alert activate when you fall below an amount you choose, whether its $1,000, $100 or $10. A related alert can tell you when your credit card balance is approaching the limit. In addition, you might be able to schedule a daily alert that informs you of your current account balance.
What about bill payments? Mobile alerts have those covered, too.